package com.company.MovieAnalyse.analyse2;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.TextInputFormat;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;

public class JobMain extends Configured implements Tool {
    @Override
    public int run(String[] args) throws Exception {
        Job job = Job.getInstance(super.getConf(), JobMain.class.getSimpleName());
        //打包到集群上面运行时候，必须要添加以下配置，指定程序的main函数
        job.setJarByClass(JobMain.class);
        //第一步：读取输入文件解析成key，value对
        job.setInputFormatClass(TextInputFormat.class);
        TextInputFormat.addInputPath(job, new Path("J:\\the_efforts_paid_offf\\HDFS_HBase_HiveApi\\src\\main\\java\\com\\company\\datas\\douban.txt"));

        //第二步：设置mapper类
        job.setMapperClass(WordCountMapper.class);
        //设置map阶段完成之后的输出类型
        job.setMapOutputKeyClass(Text.class);
        job.setMapOutputValueClass(LongWritable.class);
        //第三步，第四步，第五步，第六步，省略
        //第七步：设置reduce类
        job.setReducerClass(WordCountReducer.class);
        //设置reduce阶段完成之后的输出类型
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(LongWritable.class);
        //第八步：设置输出类以及输出路径
        job.setOutputFormatClass(TextOutputFormat.class);
        TextOutputFormat.setOutputPath(job, new Path("J:\\the_efforts_paid_offf\\HDFS_HBase_HiveApi\\src\\main\\java\\com\\company\\output\\a2"));
        boolean b = job.waitForCompletion(true);
        return b ? 0 : 1;
    }

    /**
     * 程序main函数的入口类
     *
     * @param args
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {
        Configuration configuration = new Configuration();
        Tool tool = new JobMain();
        int run = ToolRunner.run(configuration, tool, args);
        System.exit(run);
    }
}